904145988 has 12 divisors (see below), whose sum is σ = 2109674000. Its totient is φ = 301381992.

The previous prime is 904145941. The next prime is 904146011. The reversal of 904145988 is 889541409.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×904145988² = 1634959935232992288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37672738 + ... + 37672761.

Almost surely, 2^904145988 is an apocalyptic number.

It is an amenable number.

904145988 is an abundant number, since it is smaller than the sum of its proper divisors (1205528012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

904145988 is a wasteful number, since it uses less digits than its factorization.

904145988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75345506 (or 75345504 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 904145988 is about 30069.0204030660. The cubic root of 904145988 is about 966.9696721673.

The spelling of 904145988 in words is "nine hundred four million, one hundred forty-five thousand, nine hundred eighty-eight".